Railway truck



Oct. 25, 1955 R. l.. MclNTosH ErAL 2,721,523

RALwAY TRUCK Filed April l2, 1952 4 Sheets-Sheet l g j g I( @@4157 Oct25, 1955 R. L MCINTosH ETAL RAILWAY TRUCK 4 Sheets-Sheet 2 Filed Aprill2, 1952 Oct. 25, 1955 R. L. MCINTOSH EVAL RAILWAY TRUCK 1/7 0 3 l A amwm r ih Z N H e vfc/ e r 0 m mf m I l I l l l I -i f M S 20u M 4 an .Hkn y 1 QN llllll I NN MM W @NA 1 NWN l l l l Filed April 12, 1952 Oct.25, 1955 R L, MOINTOSH ETAL RAILWAY TRUCK 4 Sheets-Sheet 4 Filed April12, 1952 United States Patent RAILWAY TRUCK Application April 12, 1952,Serial No. 282,004

2 Claims. (Cl. 10S-197) The invention relates to railway car trucks.

One object of the invention is to provide an improved construction whichdispenses with the usual bolster stabilizers, swing hangers, equalizersand spring planks.

Another object of the invention is to provide improved means forpositioning the bolster relatively to the transom which dampens thevertical and lateral movements of the bolster relatively to the truckframe.

Another object of the invention is to provide a railway car truck, whichis simple in construction, can be economically fabricated, has anadequate spring deiiection under load and has smooth ridingcharacteristics.

Other objects will appear from the detailed description.

The invention consists in the several novel features hereinafter setforth and more particularly delined by claims at the conclusion hereof.

In the drawings:

Fig. l is a plan view of a railway car truck embodying the invention,the wheels, axles, and journal boxes being shown in dotted lines;

Fig. 2 is a side elevation;

Fig. 3 is a section taken on line 3 3 of Fig. 1; Fig. 4 is a sectiontaken on line 4 4 of Fig. 1; Fig. 5 is a section taken on line 5 5 ofFig. 1; Fig. 6 is a section taken on line 6 6 of Fig. 1; Fig. 7 is asection taken on line 7 7 of Fig. 1; Fig. 7a is a section taken on line7a 7' of Fig. 4;`

Fig. 8 is a plan of a portion of the truck frame; and Fig. 9 is a planof a portion of the bolster.

The invention is exemplified in a railway car truck which is supportedon the usual track wheels 12 and axles 13 which are mounted in journalboxes 14. A frame structure includes integral side frames generallydesignated 15 having longitudinal members 16 which are connected bytransom or transverse members 17. The ends of the side frames 15 areprovided with pedestals 18 in which the journal boxes 14 are slidablyconfined.

The truck frame is yieldingly supported on the journal boxes 14 throughcoil springs 19 each of which has its lower end seated in a liner 20which is confined in a cup-shaped cap 21, which has a concave recess 22which is slidably seated on a convex rib 23 on the top of a journal box14. The upper end of each spring 19 is confined in a housing 24 at thetop of the pedestal 18. This exempliiies a spring suspension for thetruck frame which includes four coil springs over the journal boxes 14.

The longitudinal members 16 of the side frames are box-shaped in crosssection, arcuate longitudinally between the pedestals 18 and are eachprovided with a pair of upwardly facing spring sockets 28, the centersof which are disposed outwardly of the vertical longitudinal planeintersecting the centers of the coil springs 19 between the pedestalsand the journal boxes.

A bolster generally designated 30 on which the car body is pivotallysupported, includes a transverse member 31 which overlies the spacebetween the transom members 17 and an integral longitudinal member 32 atnlKCt each end of member v31. The end of each longitudinal member 32 ofthe bolster is provided with a seat 33, which is normally verticallycoaxial with one of the sockets 28 on a side frame. Coil springs 36 areinterposed between seats 37 in sockets 28 in the side frames 30 andseats 33, in the bolster respectively, for yieldingly supporting thebolster on the truck. The vertical axes of springs 36 are normallycoaxial with the sockets 28 in the side frames and are disposed outwardof the vertical plane intersecting the centers of the coil springs 19which are supported on the journal boxes 14. This relative location ofthe axes of the coil springs between the bolster andthe frame and theaxes of springs 19, between the side frame and the journal boxes 14,make it possible to dispense with equalizer bars and also contributes tothe longitudinal and lateral stability of the bolster. The springs 36carry the vertical and lateral load and the sides of sockets 28 in theside frames are liared upwardly and transversely of the truck as at 39to permit limited transverse flexing of the springs 36, and this makesit possible to dispense with the usual swing hangers.

The transom members 17 are provided adjacent and inwardly of thelongitudinal members 32 with upstanding walls 40 forming four pockets 41in which an elastic pad 42 is confined and removably held by a pin 43. Ametal plate 44 is vulcanized on the inner face of each pad 42 and has aplate 44a welded to it. A metal plate 45 slidably engages the inner faceof each plate 44a and is welded to the outer face of the bolster. Duringrelative vertical movement of the bolster and the frame structure,plates 45 will slide on plates 44.

The relative movement of the bolster and frame structure longitudinallyof the car is limited and cushioned by elastic pads 42. The engagementof plates 44 and 45 retards vertical movement of the bolster relativelyto the frame structure.

A vertical channelled seat 47 is formed on the inner face at thelongitudinal center of each side member 16 and an elastic pad 48 isseated and removably held in each seat 47. A bracket 50 is providedadjacent each end of the bolster inwardly of the side members 16. Eachbracket 50 depends below the bolster and is adapted to abut against theadjacent cushion block 48 after a predetermined relative transversemovement of the bolster and side frames for limiting the movement of thebolster transversely of the truck.

The elastic pads 42 and slidably abutting plates 44 and 45, and thedepending brackets 50 and elastic pads 48 and abutment plates 44 and 45make it possible to dispense with the usual stabilizing rods, andhydraulic vertical and horizontal snubbers. Hangers 51 for brake leversare integrally formed on the transom members.

The invention exemplilies a railway car truck which is simple inconstruction and can be economically fabricated. The construction isadapted for producing a large range of spring deiiection under load,without the usual equalizers, swing hangers and spring plank. Thebolster is held in position by four rubber pads with hardened wearplates adjacent the four corners of the transom members and wear plateswelded to the transoms which constantly bear on the plates on the pads.

The invention is not to be understood as restricted to the details setforth since these may be modified within the scope of the appendedclaims without departing from the spirit and scope of the invention.

Having thus described the invention, what we claim as new and desire toksecure by Letters Patent is:

l. In a railway truck, the combination of a frame-structure, comprising:a pair of side-frames, each including integral pedestals at its ends,and a transom between and integral with and connecting the side-frames;journal boxes movablyvmounted in the pedestals; vertical coil springsbetween the journal boxes and the pedestals; a truck bolster includinglongitudinal members at its ends, overlying the side-frames, a rigidtransverse member integral with and connecting said longitudinalmembers, and spring seats `on the ends of said longitudinal members;spring seats on the side-frames; and coil springs between the seats onthe side-frames and the ends of the longitudinal members having verticalaxes normally disposed laterally and outwardly of the verticallongitudinal plane intersecting the axes of the springs between theside-frames and the journal boxes. Y

2. In a railway truck, the combination of a frame structure, comprising:a pair ,ofl side-frames, each including integral pedestals at its ends,and a transom including a pair of transverse members between and rigidlyconnecting the side-frames; journal boxes movably mounted in thepedestals; vertical coil springs between the journal boxes and thepedestals; a truck bolster including longitudinal members at its ends,overlying the side-frames, a rigid transverse member integral with saidlongitudinal members, and spring seats on the side-frames; and coilsprings between the seats on the side-frames and the 1ongitudinalmembers, and devices adjacent the sides and each end of the bolster,eachdevice including an upstanding socket on and eXtendingLabove one ofthe side-frames, an elastic pad secured in the socket having a metallicface-plate secured thereto, and a coacting metallic plate slidablyengaging the plate on the pad for frictionally retarding relativevertical movement and cushioning relative horizontal movement betweenthe transom and the 10 bolster.

References Cited in the file of this patent UNITED STATES PATENTS 151,131,884 Wilson Mar. 16, 1915 2,168,293 Kiesel Aug. 1, 1939 2,242,212Hankins May 20, 1941 2,260,508 Chambers Oct. 28, 1941 2,598,870 WilliamsJune 3, 1952 20 2,614,507 Eksergian Oct. 21, 1952 2,652,001 Travilla, JrSept. 15, 1953

